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No. 385,168. Patented-June 26, 1888.

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D. G. BELLIS.

KNITTING MACHINE. No. 885,163. Patented June 26, 1888.

N. PETERS Phnloukhngnpber, Wnhiqglun, D, C.

UNITED STATES PATENT OFFICE.

DAVID C. BELLIS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOSIGMUND H. WEIHENMAYER, OF SAME PLACE.

MACHINE.

SPECIPICATION forming part of Letters Patent N 0. 385,163, dated June26, 1888.

Application filed October 16, 1887. Serial No. 253,447. (No model.)

To all whom it may concern:

Be it known that 1, DAVID 0. Burns, a citizen of the United States, anda resident of Philadelphia, Pennsylvania, have invented certainImprovements in Knitting-Machines, of which the following is aspecification.

My invention consists of certain improvements in knitting-machines, moreparticularly of the construction illustrated in my Patent No. 372,195,dated October 25, 1887, the main objects of my present invention beingto strengthen the construction of the needle-cylinder and its support,to improve the construction of the guard-cams and the lifting-cam in theneedle-rest, to simplify the devices for throwing the latter cam intoand out of action, and to prevent thejumping of the needles as they riseafter the action of the drawing-down cam.

In the accompanying drawings, Figure 1 is a vertical section of aknitting-machine provided with my improvements. Fig. 2 is a sectionalplan View on the line 1 2, Fig. 1. Fig. 3 is a sectional plan view onthe line 3 4, Fig. 1. Fig 4 is a view of part of the needle-rest and itslifting-ca1n. Fig. 5 is a side view of the needle operating cams withthe modified form of cam nose or guard and the stops to preventjumpingof the needles. Fig. 6 is a vertical section on the line 5 6 of Fig. 5,showing the cam-nose and its hanger in elevation; and Fig. 7 is aperspective view of the needle stop-plate and its hanger.

A is the bed-plate of the knitting-machine, which can be fixed to atable or other suitable support in any convenient way. On this bedplaterotates the cam-cylinder B, which is provided on its lower peripherywith bevel-gearing 1), engaging with a bevel-wheel, b, on thedriving-shaft B. The latteris adapted to suitable bearings in brackets aon the bed-plate. This driving-shaft may be provided with fast and loosepulleys p and p, and also with a crank-handle, H, as usual.

D is the needle-cylinder, with the usual eX- terior grooves for thereception and guidance of the latchneedlcs d. This needle-cylinder issupported on an inner central supportingcylinder, D, which is flanged atits lower end, (2. This flange d is provided with lugs m to secure thissupporting-cylinder to the under side of the bed-plate A. Aspace,however, is let't between the upper side of this flange d and the underside of the bed-plate by means ofdistance-pieces Z, and on the flangerests a cam-ring, O, provided with an arm, 0, and segmental rack 1',into which gears an operating-pinion, 1-. (See Fig. 3.) This pinion iscarried by a thumb'nut, t, adapted to bearings in a bracket, 11., on thebedplate, so that by turning this thumb-nut the cam-ring C may bepartially rotated to raise or lower the needle-cylinder. Thecorresponding cams on the latter, instead of being formed directly onthe cylinder itself, may be formed on a flanged ring, E, which, however,is secured or connected to the needlecylinder in auysuitable way. Bysecuring the supporting-cylinder D to the bed-plate and employing thebottom flange of this cylinder to support the cam ring 0, I obtain afirm, steady, and secure construction of these parts.

In my former machine the movable cam Q in'the needle-rest F, to operatein conjunction with the needles having long bits g, was arranged to bethrown into and out of action by raising and lowering it, but itsretention in the raised position was not always certain. In my presentinvention this cam Q is adapted to a horizontal slot in the wall of thecylinder, and is thrown into and out of action by a horizontal inwardand outward movement. The cam is acted on by a cam-lever, P, pivoted toa bracket, 0, on the outside of the cylinder. By turning this lever tothe position shown in Figs. 1 and 2 the cam is pressed inward, so as toproject within the cylinder sufficiently to be within the path of thelong bits of the needles, but not within the path of the short bits, thecam-lever P being such as to fail to project the cam Q inward beyond theproper point, and the needle-rest F having a shoulder, as, as shown inFig. 1, to prevent accidental inward movement of the cam beyond theprescribed line. On releasing the cam from the action of this lever P,by turning the latter to the position shown by dotted lines in Fig. 2,springs c on the cam Q, by pressing on the outer wall of the cylinder,draw the said cam outward until its inner face is flush with the innerwall of the cylinder above the needle-rest.

The automatic operation of the lever P is effected in the presentinstance by a pin, 1?, on the bed-plate, the lever coming into contactwith this pin as the cylinder is rotated. and thus-effecting themovement of the lever from the position shown by full lines to thatshown by dotted lines in Fig. 2.

In place of the sliding cam noses or guards L, (shown in my applicationabove alluded to,) I use in the present machine cams L, which overliethe ends of the fixed cams, as in the former machine, .and are pivotedto suitable pins, M, projecting at an angle to the vertical frombrackets M on the outside of the carnring, the said pivoted cams beingacted upon by springs L,- whieh tend to press themforward and downward,but permit them to yield backward and upward in the same manner as thecams L of the former machine, the present construction being preferableto the former .on account of its greater certainty of action,

and because the cams occupy less space on the inside of the cam-ring. Asthe bits of the rice dles rise in the camway after the action of thedrawing-down cam J, they have a tendency to jump above the needle-rest,and this displace ment oftlic needles is objectionable, because the bitshave a tendency to come in contact with the ends of the next acting camand cause breakages, slipping or dropping of stitches being also causedby this undue movement of the needles. In order to overcome theseobjections, therefore, I'place above the rising camway, at the end ofthe drawing-down earn J, a retainer-plate. S, which by contact with thebits of the rising needles prevents the jumping movement of the canrringin reciprocating said plate will yield without risk of breaking the bit.

I claim as my invention- 1. The combination of the bed-plate of alniitting-machine, the cam-cylinder, and a needlecylinder,withasupporting-cylinderfor the latter, flanged at its lower end and secured tothe bed-plate, and a cam-ringon the flange of the supporting-cylinder toraise and lower the needle-cylinder, all substantially as specified.

2. The combination of the needle-cylinder of a knitting-machine, havingneedles, some with long projecting bits and others with short projectingbits, witlra cam-cylinder having a needle-rest, a cam adapted to slidelaterally into and from saidneedle-rest,devices for'pushing the said caminward and drawing it outward, and means for restricting the inwardmovement before the cam reaches a position to act upon the short bits ofthe needles, all substantially as specified.

3. The combination of the needles and needle-cylinder of aknittingnnaclrine, with a cameylinder having a needle-rest, a camadapted to slide laterally in said cylinder, a cam'lever to push thesaid cam inward and springs to draw it outward, and a tripping-pinacting on said cam-lever as the latter rotates with the cam-cylinder,all substantially as specified.

4. The combination of the cam-cylinder of DAVID C. BELLIS.

Witnesses:

\VILLIAM D. CONNER, HARRY SMrrI-I.

